山下製作所 List of Products and Services

The "Pipe Shoe and Pipe Saddle (Piping Saddle)" handled by our company is a piping support fitting that is compatible with various specifications (temperature and diameter). We have completely eliminated the welding process, and the main components are constructed using a bending method with a press machine and an assembly method involving fitting. In piping construction, where the burden of on-site labor (welding work, heat treatment, securing skilled workers, etc.) significantly increases costs, eliminating the welding process contributes to a reduction in manufacturing days, maintenance of high quality, and cost reduction. 【Features】 ■ Achieves stabilization of quality and low prices by eliminating deformation and thermal effects from welding ■ No welding with the piping is required at the construction site ■ Suitable for high-temperature piping with insulation, such as for power generation equipment, using slide supports ■ Contributes to a reduction in manufacturing days, maintenance of high quality, and cost reduction ■ Usable for pipe diameters from 15A to 400A and piping temperatures below 593℃ *For more details, please download the PDF materials or feel free to inquire.

This is a spring hanger and support from LISEGA, a German company that boasts the world's top market share in pipe supports (pipe support devices). We have standard products in stock at our domestic factory in Japan, enabling short delivery times. Features of LISEGA spring hangers: - Weld-free structure (Types 21, 21, 27) - Electroplating applicable (coating applied for heavy loads) - Position marked on the travel scale during cold and operating conditions (white or red label) - Adjustable locking device - Springs are treated with electrostatic coating (CED) - Moment-free support of loads on a symmetrical axis - Favorable performance-to-product weight ratio due to lightweight design.

This is a constant hanger and support from LISEGA, a German company that boasts the world's top market share in pipe supports (pipe support devices). We also have standard products in stock at our own factory in Japan. Features of the LISEGA constant hanger: - Consistent support load due to a special operating principle - Prevention of load support capacity loss through specially treated springs - Reduction of friction force by minimizing contact areas - Wide load adjustment range at each level, eliminating the need for hanger replacement even if the operating load changes - Significant adjustment of installation positions for piping, etc., enabled by the turnbuckle function - Moment-free load application through a single support point - Locking device can be installed at any travel position - All technical specifications displayed on the nameplate - Marking of operating and cold positions on a directly readable travel scale - Load scale marked with set load - Symmetrical design ensures direct force transmission along the symmetry axis - Favorable performance - product weight ratio - Sustained operating characteristics due to high-quality corrosion protection and maintenance-free nickel treatment - Versatility through design suitable for installation conditions and standardized accessories.

This is a hydraulic snubber (hydraulic vibration damper) from the German company LISEGA, which boasts the world's top market share in pipe supports (piping support devices). We have standard products in stock at our domestic factory in Japan, enabling us to respond to short delivery times. LISEGA's hydraulic snubbers have been in use for over 40 years. The most common cause of trouble with hydraulic snubbers is oil leakage due to rapid wear, damage, and corrosion; however, LISEGA has optimized the internal sealing mechanism, guides, and hydraulic oil of the hydraulic snubber, ensuring that it functions without issues for at least 23 years in the normal operating conditions of a nuclear power plant, as proven by reliable certification methods. LISEGA hydraulic snubbers guarantee excellent performance and long service life due to the following quality characteristics: - Body parts are made from corrosion-resistant materials - Adoption of a special sealing mechanism - Adoption of a special vibration-resistant guide - Built-in oil reservoir - Approved minimum maintenance-free operating period of 23 years through testing - 60-year design life - Certification of conformity testing according to KTA3205.3 - Product design in accordance with ASME-NCA3800

This is a pipe clamp from LISEGA, a German company that boasts the world's top market share in pipe support (piping support devices). We stock standard products in our domestic factory in Japan, enabling short delivery times. This pipe clamp is compatible with various specifications (pipe diameter, load, fluid temperature, insulation thickness). - Thorough standardization allows for quick delivery. - LISEGA products, which are lightweight and easy to install with compatible connections, enable efficient installation. - Compact product dimensions reduce heat loss. - Pipe clamps used in high temperature ranges are made from materials certified by EN 10204-3.1. Product types: horizontal clamps, riser clamps, dynamic clamps Pipe sizes: outer diameter 21.3 (equivalent to 15A) to 1219 (equivalent to 1200A) Fluid temperature: up to 650℃ Main materials: DIN-EN materials We also design pipe clamps according to special specifications.

This is a U-bolt that conforms to various piping specifications (temperature and diameter). It has a proven track record of use in plant piping, such as in power generation facilities. In addition to steel (SS400), we also offer stainless steel (SUS304) U-bolts, and we have standard products in stock. U-bolts for ANSI pipe diameters are also available as standard products. They can be supplied as a set with nuts and washers for fixing. Pipe sizes: Outer diameter 13.8 (equivalent to 8A) to 1219.2 (equivalent to 1200A) Operating temperature: Steel up to 350℃, Stainless steel up to 575℃ Materials used: JIS G3101 SS400 / JIS G4304, G4305 SUS304

This is a rigid strut (restraint) from the German company LISEGA, which boasts the world's top market share in pipe supports (piping support devices). It is used where displacement needs to be restricted during operation, rigidly coupling from connection point to connection point, and does not allow axial movement. Since it uses spherical bearings, it permits slight lateral displacement. It plays an important role in the safety of piping systems during operation. - Transmission of displacement from unexpected load events - Induction function to control the planned thermal movement direction of the piping system - Stabilization through zero-point fixation of flexible piping systems - Designed for axial fixation Applications: Restraints for plant equipment and piping Rated load: 4 to 1000 kN Installation length: 375 to 6000 mm (with adjustment options of 150 mm or 300 mm) Main material: Carbon steel It consists of a joint with spherical bearings at both ends and a highly rigid main body. Installation to structures is done using welded brackets (Type 35), and connection to piping is made using dynamic clamps.

This is a rigid hanger from LISEGA, a German company that boasts the world's top market share in pipe supports (pipe support devices). We have standard products in stock at our domestic factory in Japan, enabling short delivery times. LISEGA connection components have special advantages: - Wide range of applicability - Load and connection compatibility through a modular system - Forged and heat-treated - Standard electroplating and optional hot-dip galvanizing - Approval through special type testing They consist of combinations of screw-machined connection components such as eye nuts (Type 60), clevises (Type 61), turnbuckles (Type 62), rod couplings (Type 64), connecting rods (Types 65, 66, 67), and hex nuts (Type 63). 【Standard Specifications】 Rated load: 0.3 to 400 kN Bolt size: M10 to M80 Rod length: 500 to 3000 mm We also design rigid hangers (connection components) according to special specifications. We can also propose rigid hangers made from alloy steel materials suitable for high-temperature environments, such as inside boilers.

This is a support bracket suitable for a wide range of pipe diameters and high-temperature piping. Specifically, it is a newly developed weldless pipe shoe saddle designed for use as a slide support in areas where the axial load on the piping is relatively large. In the manufacturing process, welding has been thoroughly eliminated, and the main components are constructed using a press machine for plate bending and assembly through fitting, thus eliminating deformation and thermal effects caused by welding, achieving quality stabilization and low cost. No welding is required at the construction site. By omitting the burdens associated with the welding process (such as heat treatment and securing skilled workers), it contributes to a reduction in construction days, maintenance of high quality, and cost reduction in piping construction, where these burdens can significantly increase costs. It is ideal for slide supports for high-temperature piping with insulation, such as in power plants. It can be used for pipe diameters from 65A to 400A and for pipe temperatures up to 593°C. For more details, please download the PDF materials or feel free to contact us.

In industrial plants, piping plays a crucial role in connecting various equipment and devices that make up the plant, and the function of pipe supports (also referred to as hangers) is to install and maintain these pipes within the plant's space. If this role is not fulfilled safely and reliably, it can cause undue forces and stresses on the piping, adversely affecting the connected equipment and potentially disrupting the operation of the plant. Therefore, to maintain and operate the plant safely, regular inspection and maintenance of pipe supports are essential, and planned periodic inspections and diagnostics are necessary. From the perspective of diagnosing pipe supports, we will explain in detail the diagnostic methods, their effects, and examples of non-conforming items detected through inspections. Please feel free to download the PDF document (Technical Material: Inspection and Diagnostic Techniques for Pipe Supports) or contact us for more information. According to your needs, we will conduct on-site inspections and diagnostics of pipe supports by experienced technicians.

To ensure that the various functions of pipe supports (piping support devices) are reliably maintained, it is very important to regularly and continuously inspect their condition. By early detection and addressing of abnormalities, we can ensure the integrity of the piping and the entire plant. We will explain the types of pipe supports, the inspection procedures, common non-conformities, as well as preventive measures and responses. Please feel free to download the PDF materials (Technical Document: Repair Techniques and Maintenance for Pipe Supports) or contact us for inquiries. Upon request, experienced technicians will visit the site to conduct inspections and diagnostics of the pipe supports.

Pipe supports (pipe support devices) are always used in the piping within industrial plants and factory equipment, including power plants. Maintaining the functionality of various pipe supports is crucial for keeping the entire plant and factory equipment safe and operating normally. Regular and continuous inspections of pipe supports are essential for ensuring the integrity of the piping and the entire plant. We present the current inspection guidelines for pipe supports. *For more details, please refer to the PDF document (Technical Document: Current Inspection Guidelines for Pipe Supports). If necessary, experienced technicians will visit the site to conduct the current inspection of the pipe supports, so please feel free to contact us.

Various piping systems are arranged in power plants and various industrial plants. Pipe supports are designed to bear the weight of these pipes, but in addition to this, they are required to perform various functions such as limiting pipe displacement and protecting against external forces. Therefore, they are closely related to pipe design (especially thermal stress analysis), and it is desirable to understand and design the various characteristics of pipe supports. This document introduces the basics of pipe support design. *For more details, please refer to the PDF document (Technical Document: Basics of Pipe Support Design). We have experienced design engineers available, so please feel free to contact us with any inquiries.

In designing piping systems, pipe supports are inextricably linked, and it is no exaggeration to say that the overall quality of the piping system is influenced by how well the supports are arranged. This document introduces the key points regarding pipe supports and the methods for determining spans, along with the procedures and considerations to keep in mind during the setup. *For more details, please refer to the PDF document (Technical Material: Methods for Determining Support Points and Spans).* We have experienced design engineers available, so please feel free to contact us with any inquiries.

Various types of piping are arranged in power generation facilities and various plants. Pipe supports (piping support devices) are designed to support the weight of these pipes, but they are also closely related to the design of the piping (especially thermal stress analysis), and it is desirable to understand their functions beyond just weight support. This document introduces the basic functions of pipe supports and their selection. *For more details, please refer to the PDF document [Technical Material: Pipe Supports (Piping Support Devices)]. We have experienced design engineers available, so please feel free to contact us with any inquiries.

This is an optimal piping support fitting for various pipes with insulation. It eliminates the welding process entirely and is constructed using a bending and fitting assembly method, achieving cost reduction. In the construction site, welding with the pipes is completely unnecessary. Benefits of being weld-free: - No need for skilled craftsmanship (welders) - Elimination of thermal distortion and finishing work - No need for compliance with regulations (welding fumes), etc. By eliminating deformation and thermal effects caused by welding, it contributes to stabilizing quality, shortening manufacturing lead times, maintaining high quality, and reducing costs. It can be used for pipe diameters from 15A to 400A and at pipe temperatures below 593°C. *For more details, please refer to the PDF document (product dimensional specifications). Please feel free to contact us with any questions or for more information.